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A strange phenomenon that has puzzled intelligence researchers and testers is called the Flynn effect.

What is the Flynn effect?


A stereotype threat that might cause some groups of students to under perform on intelligence tests.


The superiority of certain racial and ethnic groups on intelligence test scoring.


The fact that male performance on math tests is more extreme (more high and low scores) than female performance.


A gradual improvement on intelligence test scores over the decades since 1930.


Predictive validity of some intelligence tests.

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